Internal-combustion engine.



G. A. METGALP & L. T. ROCHBLEAU.

INTERNAL COMBUSTION ENGINE.

APPLIOLTIOII FILED JUNE 16. 1911.

Patented Dec. 5, 1911.

IN VENTORS J I T a a @i a L7 4. I IrIHIE (f V\ s d w I 1 EN W WWW, W a Jk WITNESSES UNITED STATES PATENT OFFICE.

GEORGE A. METCALF AND LOUIS T. ROCHELEAU, OF WOONSOCKF NI I'INTERNAL-COMBUSTION ENGINE.

To all whom it may concern:

Be it known that we, GEORGE A. MmcALr and LOUIS T. ROCHEL'EAU, citizensof the United States, residing at lloonsocket, in the county ofProvidence and State of Rhode Island, have invented new and usefulImprovements in Internal- Combustion Engines, of which the following isa specification.

This invention has to do with internal combustion engines of thetwocyole type; and it contemplates the provision of a valvelcss engine,of the kind stated, and one that has but few working parts, and is con;structed with a view to assuring the thorough sweeping of products ofcombustion from the explosion chamber by the inrushing explosivemixture, the latter being materially advantageous inasmuch as itcontributes-to the reliability and capacity of the engine and economy inthe o eration of the same.

Other objects will e understood from the following description andclaims when the some are read in connection with the drawing,accompanying and forming part of this specification, in which the figureis a vertical central section of an engine constructed in accordancewith the invention.

Referring by letter to the drawing: A is the cylinder, and B the pistonof the engine, the piston being, by preference, connected through theusual pitman C with the ordiruiry crank D. The cylinder is divided bythe piston into an explosion chamber E and a compression chamber F, andat the center of the inner end of the explosion chamber is an'ignitiondevice G which is preferably, though not necessarily, electric. At H thecylinder is )rovided with a port for the admission of explosive mixture,and at I it has a port for the discharge of products of combustion.Located at the same side of the cylinder as the intake port H anddiametrically opposite the exhaust port I is a passage J. This passageis formed in the wall of the cylinder and has both of its ends opposedto the ath of the piston. It will be noticed that t e upper or dischargeend a of said passage J is dlsposed or directed toward the longitudinalcenter and inner end of the explosion chamber; also, that said end a islocated in a plane about midway between that of the exhaust ortyl andthat of the inner end of the exp osion chamber, for important reasonsheremaften set forth. The piston is divided by a transverse parti-Specification of Letters Patent.

Application filed June 16, 1911.

Patented Dec. 5, 1911'.

Serial No. 683,564.

tion 2) into a chambered portionicthat co n municates with thecompression chamljenl and a chambered portionml that conunirni cateswith the explosion chamber, the

chambered portion 0 being provided with an outlet port 0 designedtoregister with the outer end of. the passage J, and the chambered portion(1 being provided with an outlet port f, designed to register with theexhaust port I. r a i r The operation is as follows; VVheh the piston isat the innermostkpoint of itstray-i toward the longitudinal cent e g andinner; 3

end of the explosion chamber... Thiscaus es the explosive mixturetoqstrike figst. the

inner end of the cylinder near theaspa'fiken then the cylinder wall ata,poiut diajmetri;

rally opposite the passage cnd o and near the inner end of the exploslonchambennnd, from said point the explosiyelmixturegebounds and strikesthe pontibmpfihgpi on chamber at adjacent the "fagssag ,l axr fi ly,occupies said chamber. g wig that before the piston closes,thapgssagegpda and the exhaust port I, thetexplpg' vgti llgfi; ture will haveeffectually, swept el l gat, products of the previous ewplosipn .f glp ae chamber E; also, h mammalian-E bustion are forced before the explosivemixture from the inner end of the chamber E outward toward the exhaustport, so that all of the products of combustion must be exhausted beforeany of the explosive mixture can escape, and before the latter can takelace the port I will have been closed. It w' 1 further be noted thatbecause of the course the explosive mixture is caused to take in theexplosion chamber E, the same will be put into close proximity with theignition or sparking device G and will eflectually sweep all prod cts ofcombustion away from said point, t ereby assuring per-- fect explosive mxture to receive the s ark.

In addition to the advantages set 0rth,'

' plosive mixture.

it may be stated that the piston of the improved engine has a greatbearing surface calculated to conduce to smooth running, and that thearrangement of the passage J adjacent the inner end of the piston, asshown, is advantageous because y reason of such arrangement the passageJ is remote from the splash of oil in the compression chamber and crankcase, and hence there is no liability of an excess of oil ontering theexplosion chamber with the ex- Having described our invention, A'vhat weclaim and desire to secure by Letters- Patent, is:

1. In an internal combustion engine of the two-cycle type, thecombination of a cylinder, a iston, and an ignition device located at te inner end of the cylinder; the cylinder being divided by the pistoninto an explosion chamber and a compression chamber, and being providedwith a port for the admission of explosive mixture to the compressionchamber, a port for the dischar e of products of combustion from theexplbsion chamber, and a fpassage having its ends opposed to the path 0the piston and also having its inner end diametrically opposite theexhaust port and directed toward the longitudinal center and inner endof the ex losion chamber and located in a plane substantiallymidwaybetween that of the inner end of the cylinder and that of the ex-7,

haust port, and the piston being, provided with a transverse partitionand chambered portions at opposite sides of the same and bein alsorovided with a ort for connecting its inner chamber wit1 the exhaustport, and a port for connecting its outer chamber with the outer end ofthe passage in the cylinder.

2. In an internal combustion engine, the

I combination of a cylinder and a piston; the

cylinder being divided by the piston into an explosion chamber and acompression chamber, and being provided with a port for the admission ofexplosive mixture to the compression chamber, a ort for the dischar e ofproducts of com ustion from the expdosion chamber, and a passage havingan inner end opposed to the path of the piston and also having saidinner end opposite the exhaust port and directed toward the longitudinalcenterand inner end of the explosion chamber and located in a planeintermediate that of the inner end of the cylinder and that of theexhaust port, and. the piston bein provided with means for establishingan interrupting communication between the ex losion chamber and theexhaust port and being also provided with means for establishing andinterrupting communication between the compression chamber and the outerend of the said passage in the cylinder.

In an internal combustion engine, the combination of a cylinder and apiston; the

cylinder being divided by the piston into an explosion chamber and acompression chamber, and being provided with a port for the admission ofexplosive mixture to the compression chamber, a port for the dischargeof products of combustion from the explosion chamber, and a passagehaving an inner endopposed to the path of the piston and alsohaving saidinner end opposite the exhaust port and directed toward the longitudinalcenter and inner end of the explosion. chamber and located in a planeintermediate that of the inner end of the cylinder and that of theexhaust port; said passage being adapted to be supplied with explosivemixture from the compression chamber, and the piston being provided withmeans for establishing and interrupting communication between theexplosion chamber and the exhaust port and being also provided withmeans for establishing and interrupting communication between theexplosion chamber and the inner end of the said passage.

In testimony whereof we have hereunto set ourhandsin presence of twosubscribing witnesses. i

GEORGE A. METCALF. LOUIS T. ROCHELEAU.

Witnesses:

EDGAR L. SPAULDING, EVELYN W. SPAULDING.

